Sign support



FIG. 1 is an upper perspective view of a sign support showing my new design.

FIG. 2 is a front view of a sign support showing my new design.

FIG. 3 is a rear view of a sign support showing my new design.

FIG. 4 is a left side view of a sign support showing my new design.

FIG. 5 is a right side view of a sign support showing my new design.

FIG. 6 is a top view of a sign support showing my new design; and,

FIG. 7 is a bottom view of a sign support showing my new design. 

The ornamental design for a sign support, as shown and described. 